TY - JOUR
T1 - Three 4,7-diaryl-2-ethylsulfanylpyrazolo[1,5-a][1,3,5] triazines
AU - Insuasty, Henry
AU - Mier, Paola
AU - Suarez, Gina
AU - Low, John N.
AU - Cobo, Justo
AU - Glidewell, Christopher
PY - 2008/1
Y1 - 2008/1
N2 - The molecular dimensions of 2-ethylsulfanyl-7-(4-methylphenyl)4-phenylpyrazolo[1,5-a][1,3,5] triazine, C20H18N4S, (I), 7-(4-chlorophenyl)-2-ethylsulfanyl-4-phenylpyrazolo[1,5a][1,3,5] triazine, C19H15ClN4S, (II), and 4,7-bis(4-chlorophenyl)2-(ethylsulfanyl) pyrazolo[1,5-a][1,3,5] triazine, C19H14Cl2N4S, (III), show evidence for some aromatic delocalization in the pyrazole rings. The conformations adopted by the ethylsulfanyl substituents are different in all three compounds. There are no hydrogen bonds in any of the crystal structures, but pairs of molecules in (II) and (III) are linked into centrosymmetric dimers by pi-stacking interactions.
AB - The molecular dimensions of 2-ethylsulfanyl-7-(4-methylphenyl)4-phenylpyrazolo[1,5-a][1,3,5] triazine, C20H18N4S, (I), 7-(4-chlorophenyl)-2-ethylsulfanyl-4-phenylpyrazolo[1,5a][1,3,5] triazine, C19H15ClN4S, (II), and 4,7-bis(4-chlorophenyl)2-(ethylsulfanyl) pyrazolo[1,5-a][1,3,5] triazine, C19H14Cl2N4S, (III), show evidence for some aromatic delocalization in the pyrazole rings. The conformations adopted by the ethylsulfanyl substituents are different in all three compounds. There are no hydrogen bonds in any of the crystal structures, but pairs of molecules in (II) and (III) are linked into centrosymmetric dimers by pi-stacking interactions.
U2 - 10.1107/S0108270107064074
DO - 10.1107/S0108270107064074
M3 - Article
SN - 1600-5759
VL - 64
JO - Acta Crystallographica Section C-Crystal Structure Communications
JF - Acta Crystallographica Section C-Crystal Structure Communications
ER -